International Mail - No response from SAPO/EMS

My International order arrived on 7 December 2017 and was scanned into custom on 7 December 2017. I called the following telephone numbers daily and there was no response. ********** 053/6 ********** *** ********** 020 I emailed various email contact address to follow up on my package. I received a reply from this email ********** requesting a tax invoice on 10 January 2018. I submitted the tax invoice. A week later and no response on what has happened to my package. I check track and trace and all this states is the package is in transit. I called Germiston hub and they do not have the package. The package is still at JHB international. The SAPO customer service is pathetic. I am trying to run a business and have client waiting for there products. How can a department have no accountability. WHO DO I CONTACT IF THIS PACKAGE IS MISSING. Can someone please advise me how to I find out where is my package.